PV Powered 3000 Service Manual download pdf (Page 61)

PVI 3000S, 4000S, 5000S, 5300 Series Inverters

Installation and Operation Manual (Rev A)

9.0 Technical Data

Input (DC) from PV array:

• Maximum open circuit voltage of PV array is 600V DC

WARNING: NEC 690-7 must be followed to calculate the maximum number of PV

modules allowed for a maximum inverter open circuit voltage (OCV) of 600V DC in

extreme cold temperatures for the installation location.

The open circuit voltage of PV modules depends on the cell temperature and the solar

irradiation. The highest open circuit voltage occurs when the PV modules are at the

coldest temperature and in bright sun.

Because the PV modules also have a reduction in voltage at high cell temperatures, you must

make sure the MPPT voltage of the strings will not drop below the minimum inverter DC input

voltage in very hot temperature conditions.

Both the maximum open circuit voltage (OCV) when at cold extreme and minimum MPPT voltage

when at hot extreme can be calculated for a PV module using its specification sheet. PV module

string sizing can then be used to determine how many modules can be used in a string. Visit

www.solren.com/stringsizing.html to use Solectria’s interactive string sizing tool.

9.1 Input DC (PV) Specifications

PVI 3000S PVI 4000S PVI 5000S PVI 5300 Unit

Maximum open circuit voltage

600

VDC

Operating Voltage

MPPT

range

200

550

VDC

Strike Voltage

235

VDC

Maximum Input current

ADC

Maximum Short Circuit Current

ADC

Fused Inputs

DC ground fault trip settings

ADC

Table 9.1 – DC Input Specifications

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PV Powered 3000 Service Manual Page 61